Including a section of single lane highway, 2 km in length, whose main parts were:
- The Amaña and Katillu tunnels, 245 m and 185 m in length respectively.
- The Ego River viaduct. A 4 vane isostatic bridge, with pre-fabricated beams.
- The Legarre Bridge, which has a length of 80 m and consists of a two vane pretensioned cement structure.